Fruits and vegetables make the best light-weight, healthy snacks and they are perfect to eat before your run. One of these is spinach. It is full of antioxidants and anti-inflammatory properties and is a great source of iron. Brussel Sprouts help lower your cholesterol and are full of protein to help keep your energy up. As for fruits, blueberries are low in calories and contain high amounts of fiber. Perfect for smoothies or protein shakes, and you can even add some to your oats. Peaches are high in calcium, vitamin B, potassium and antioxidants and can be added to a variety of breakfast snacks to get just the boost you need before your run.